For 3 days I have been unable to open emails due to this issue. Including emails I have had for many years, which I could open up until 3 days ago. I also cannot send emails as it says it 'does not recognise the recipient'.

I have tried to defrag as per other questions on here, but it made no difference.

One of the advices was to uninstall the program, but the instructions to do so link goes to a dead page.

Can somebody please help me urgently as having no emails is very bad

Thanks, Paul